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v3.19.1

Long Term Debt (Narrative) (Details) $ in Millions, $ in Millions, $ in Millions | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2018 CAD ($) | Dec. 31, 2017 CAD ($) | Nov. 15, 2018 USD ($) | Oct. 04, 2018 USD ($) | Jun. 07, 2018 USD ($) | May 16, 2018 CAD ($) | Feb. 28, 2018 USD ($) | Jan. 12, 2018 BBD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock | $ 10 | $ 682 |  |  |  |  |  |
Repayments of Long-term Debt | 757 | 453 |  |  |  |  |  |
Issuance of preferred stock, net of issuance costs | 291 | 0 |  |  |  |  |  |
Emera Inc |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Gross | 2,701 | $ 2,363 |  |  |  |  |  |
Emera Inc | Debt and Preferred Equity Shelf Prospectus [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Face Amount | $ 450 |  |  |  |  | $ 750 |  |
Debt Instrument, Maturity Date | Jun. 16, 2020 |  |  |  |  |  |  |
Issuance of preferred stock, net of issuance costs | $ 300 |  |  |  |  |  |  |
Nova Scotia Power Inc. [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of Credit Facility, Expiration Date | Oct. 01, 2023 | Oct. 01, 2021 |  |  |  |  |  |
Long-term Debt, Gross | $ 2,576 | $ 2,424 |  |  |  |  |  |
Nova Scotia Power Inc. [Member] | Medium-term Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Gross | $ 1,965 | $ 1,965 |  |  |  |  |  |
Emera Brunswick Pipeline Company Limited [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of Credit Facility, Expiration Date | Feb. 01, 2022 | Feb. 01, 2021 |  |  |  |  |  |
Tampa Electric Division [Member] | U.S. Notes, Due 2048 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 4.30% |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 350 |  |  |
Debt Instrument, Maturity Date | Jun. 15, 2048 |  |  |  |  |  |  |
Tampa Electric Division [Member] | U.S. Notes, Due 2049 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 4.45% |  |  |  |
Debt Instrument, Face Amount |  |  |  | $ 375 |  |  |  |
Debt Instrument, Maturity Date | Jun. 15, 2049 |  |  |  |  |  |  |
TECO Finance, Inc. [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Gross | $ 409 | $ 690 |  |  |  |  |  |
TECO Finance, Inc. [Member] | U.S. Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Repayments of Long-term Debt | $ 250 |  |  |  |  |  |  |
ECI [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 4.00%
Debt Instrument, Maturity Date | Jan. 12, 2023 |  |  |  |  |  |  |
Long-term Debt, Gross |  |  |  |  |  |  |  | $ 18
Emera Maine [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Gross | $ 478 | $ 408 |  |  |  |  |  |
Emera Maine [Member] | Line of Credit [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  | $ 80 |
Line of Credit Facility, Expiration Date | Feb. 28, 2023 | Sep. 25, 2019 |  |  |  |  |  |
Emera Maine [Member] | U.S. Notes, Due 2048 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.71% |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 50 |  |  |  |  |
Debt Instrument, Maturity Date | Nov. 15, 2048 |  |  |  |  |  |  |
Grand Bahama Power Company Limited [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Gross | $ 182 | $ 166 |  |  |  |  |  |

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